| 摘要 |
A seismic sensor for a security system is described, the sensor comprising: a piezoelectric transducer suitable for converting mechanical stresses into electrical signals; a base structure including a seat suitable for receiving said transducer; a cover element that can be coupled with the base structure to define an inner chamber of said sensor. The sensor is wherein the cover element has an essentially bell-shaped body, is equipped with a bottom opening and includes side walls that extend around an axis of said opening, the base structure being provided with a collar that surrounds said seat and that crosses said bottom opening so as to define at least one channel communicating with said chamber between the side walls of said cover element and said collar.
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